Screw-cutting die.



W. R.` RIOUX. SCREW CUTTING DIE.l APPucAnoN FILED DEc.a. 1916.

1,220,460. Patented Mar. 27, 1917.

VILLIATJI E. ROUX, OF MONTREAL, QUEBEC, CANADA.

SCREW-CUTTING DIE.

specification of Letters Patent. Patented Eilat'. 2'?, i917.

Application led Becember 8, 1916. Serial No. 135,791.

To all wwm z'z may concern:

Be it hn' vn that l, WiLLiAM R. RIOUX, a subject oi the ling ot GreatBritain, residing at lifontreal, Province of Quebec, lCanada, ha veinvented certain new and useiful improvements in Screw-Cutting Dies; andl do hereby declare tnat the following is a iull7 clear, and enactvdescription of the inwentien7 such as will enable others skilled in theart to which it appertains to make anc use the saine.

rlhe present invention relates to a die and more particularly to a screwcutting die dapted to cut left or right handed threads upon a bolt orrod, and an object of the present invention is to provide a die of thischaracter whereby the die cutters or chasers may be easily and readilyprojected to the desired angle for giving clearance and the heel oi1 thechasers may be projected radially toward the center or the die whichwill eliminate any undue friction and thereby increasingthe ei'iiciencyot the die.

YWith the above and other objects in View which will hereinafter appearas the description continues, the invention consists of the novel`features of construction, combination and iormaion of parts as will behereinafter more fully described and parti cularly pointed out in theappended claims.

ln the accompanying drawings has been shown the simple and preferredforni oit the invention, it being, however, unde 1stood that nolimitation is necessarily made to the ,preoise structural details hereinexhibited, but the right is hereby reserved to any changes, alterationsor modifications to which recourse may be had that come within the scopeof the claims without departing from the spirit of the invention orsacricing the eiliciency of the same.

ln the accompanying drawings:

Figure l is a plan view of the die embodying the present invention; and,

Fig. 2 is a vertical section through the saine taken on the line 2 2 ofFig. 1 in the direction of the arrows as shown.

Referring now more particularly to the accompanying drawings whereinlike and corresponding parts are designated by similar referencecharacters throughout the sev eral views.

rlhe die forming the subject matter of. the present invention comprisesa ring preferably made of a single piece of metal having the screwchasers formed integraltherewith, but at the saine time adapted to beadjacent to the desired angle without impairing the strength orelliciency oi' the die.

The numeral l indicates a ring which may b e split as L so that it mayreadily lit any chuck or case and projecting radially toward the centerof the ring and formed integral therewith are the screw chasers whichare shown preferably three in number. Each of these screw chaserscomprises a toot or web portion 3 which are formed to give to thechasers the required strength, and it is,of course, to be understoodthat as great an amount of metal may be left to enlarge these footportions, as is desired. Forni-ed within the outer faces of the footportions 3 are the laterally extending thread cutting edges l. Formedwithin each oi the web portions 3 ci the chasers are the diagonallyextending slots 5 which extend through the web portions having anenlarged aperture o formed at the foot thereof and :termed within theweb portions adjacent the outer ends of the slots is an enlargedcircular aperture 7 through which a. tapered pin, screw or other peeningdevice 8 may extend.

The diagonally extending` slots 5 do not in any manner impair thestrength of the Vweb portions of the chasers7 but by inserting a peeningdevice such as a. tapered plug within the opening 7 the screw cuttingVedges will be thrown to the desired angle so as to give the eye oi' thedie the required clearance and at the same time the foot portions of thecutting edges will be moved readily toward the center of' the die.

lWhereas in the drawings l have shown a substantially truncated conicalpin, it is, of course, to be understood that this pin may be in thenature ofv a. screw adapted to be threaded within the aperture 7 or anyother suitable tapering peening device may be used.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent is:

l. A die of the character described comprising a body portion, aplurality oi screw chasers formed integral therewith, the base portionof said chasers having diagonally extending slots formeel therein andmeans adapted to be. inserted within said slots for moving said chasersto different angles substantially as and for the purpose specified.

2. ln a die of the character described comprising a ring, a plurality ofinwardly projecting screw chasers formed integral therewith, the baseportions of .said screw chasers each having a diagonally extending slottherein and having one end terminating at one side of said screwchasers, and tapered plugs adapted to be inserted within said slots forthe purpose specified.

8. ln a die of the character described cornprising a split ring, aplurality of chasers formed integral therewith, each of said chaserscomprising a web portion, each of said web portions having a diagonallyextending slot formed therein and extending` transversely throughouteach web portion, and aytapered pin adapted to be inserted within eachof said slots adjacent the open ends thereof substantially as and forthe purpose specified.

4. ln a die oit' the character described comprising a split ring, aplurality of radially extending screw chasers orrned integral therewith,each of said screw chasers comprising a web portion having screw cuttingedges formed at and extending transversely across the outer endsthereof, said web portions each having a diagonally extending slotformed therein and extend ing transversely throughout each web portion,the inner end of each of said slots terminating in an enlarged aperture,the opposite ends of said slots each having an enlarged transverselyextending aperture corninunicating therewith, and a tapered pin adaptedto be inserted within each of said enlarged apertures substantially asand for the purpose specified.

In witness whereof I have hereunto set my Y hand.

WILLIAM RIOUX.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

